Rotary pump.



B.P.G ATHGART. ROTARY PUMP.

APPLICATION :FILED PLBO, y1913.

Patented June 16,1914.

WITNESS- s f s v il BENJAMIN FRANKLIN CATHCART, O15 FRESNO, CALIFORNIA.

ROTARY PUMP.

Specification of Letters Patent.

Patented June 16, 1914.

Application filed Apr130, 1913. i Serial No. 764,556.

To all cci/1,0m t may concern Be it known that I, BENJAMIN F. CATH- cnnr, a citizen of the United States, and a resident of Fresno, in the county of Fresno and State of California, have invented a new and Improved Rotary Pump, of which the Jfollowing` is a full, clear, and exact description. s The. invention relates to improvements in rotary pumps of the vertical type, and has reference more particularly to t-he casing structure for the pump.

An object of the invention is t0 provide an inexpensive, simple and eflicient rotary pump relieved of end thrusts.

further object of the invention is to give to the liquid pumped a spiral motion by providing spirallyl directed inlets and outlets.

The invention consists of the construction and combination of parts to be more fully described hereinafter and fully set forth in the claims.

Reference is to be had to the accompanying drawings forming a part of this speci` fication, in whichlike characters indicate corresponding parts in all the views and in which:

Figure 1 is a vertical section on line 1 1, Fig. 8, showing two superposcd pumps embodying my invention; Fig. 2 is a. section on line Q-2, Fig. 1; Fig. 3 is a cross scction on line 3 3, Fig. 1.: Fig. 4 is a cross section on line 1 -i.. Fig. 1; Fig. 5 is a section on line .'1-5. Fig. 3; and Fig. G is a perspective view of the cylinder proper with the projections forming the passageways, and the whole forming a director.

Referring to the drawings, 10 indicates thc exterior tubular casing or shell inclosing a cylinder 11 concentric with the casing 10. The cylinder 11 is provided with a central opening at its lower end having the diameter ot the cylinder, while the upper end 12 of the cylinder is provided with an axial bore 11 and adjacent the bore a collar 13. The. cylinder 11 is provided at its upper and lower ends with flange portions 15 extending from the exterior lateral surface of the cylinder to the interior lateral surface of the casing 10.v 'The upper fiangcs 15 are parallel to the lower flanges 15 but turned through an angle with reference to the lower flanges. so that the lateral rihs 1li connecting the ends lot' the upper and lower flanges form spirals on the exterior lateral surface form the director for of the cylinder, the ribs 16 fitting snugly against the inner lateral surface of the casing 10.

The upper and lower flanges 15 and the spiral ribs 16 torni spiral lateral passageways open only at one end. Two of the oppositely disposed passageways are open at one end and the other two at the opposite end. The passageways open at the lower end communicate withthe cylinder by means of an opening 17 provided in the lateral surface of the cylinder adjacent the upper flange 12. The spiral passageways open at the upper ends communicate with the cylinder by means of openings 18 formed in .the lateral surface of the cylinder intermediate the opening 1T and the lower end of the cylinder. The openings 17 and 18 are formed between the ribs 1G and the width of the openings is substantially equal to the spiral passagewaysfformed by the spiral ribs 16. The cylinder 11, flanges 15, and ribs 16 the liquid when in place in the casing 10.

The cylinder 11 is secured to casing 10 by means of screws. or any other suitable means, engaging the flanges 15 and the casing 10. Positioned in the cylinder 11 is a rotor 19 formed of a plurality ot' fan-shaped blades Q0 rigidly secured to a vertical shaft Q1. The lateral edges of the blades Q0 are parallel to thc axis ot the shaft 21; and rigidly secured to the ends of the blades Q0 are flanges 22 provided with central openings Q3, the flanges and bladesI fitting snugly into the cylinder 11. The. shaft Q1 is bearing with its lower end in a spider plate 21 secured to the casing 10. The length of the blades oi the rotor 19, including the flanges 2Q, is such that it extends from Athe lowermost end ot' the cylinder up to the opening 17 in the same, the length oi the opening 18 in the cylinder being substantially equal to the distance between the flanges Q2 of the 'rotor'. The shaft Q1 passes through'bore 14 into the delivery pipe Q5 secured to the casing 10 through the upper closed end ofthe same, whe i a collar Qfl is secured to the projet-ting end of the shaft. The collar QG rests against the upper end of the delivery pipe Q5; and a cap 27 engages the collar QG and the closed upper end of the delivery pipe Q5 to prevent vertical motion of the shaft Q1.

As shown in Fig. 1, two superposed pumps are placed. in view of the :tact that each pump can raise water Li() feet above its cen- Y ber of blades on the rotor.

ter; and when it is desired to raise water to a higher level, a second pump is added for each additional 40 feet or fraction thereof.

v When the shaft 21'is caused to rotate by any means in the direction indicated in Fig. 4 the water enters into the cylinder through the lower end of the cylinder through the opening 23 in flange 22, also, the water is caused to pass through the spiral passageways having the opening at the lower end, through the inlet openings 17, through the upper opening 28 of the upper flange 22 into the cylinder. The liquid entering from both ends of the cylinder relieves the rotor from end thrusts. It will also be remarked that the liquid entering the upper end of the cylinder through the inlet opening 17 receives a spiral motion in the direction of the motion of the rotor. Similarly the liquid, forced by the blades 20 through the outlet openings 18, receives a spiral motion when forced through the passageways open at the upper end leading to the delivery pipe 25. The pitch of the spiral that will give a better elliciency for the raised water depends on the number of revolutions, the length of the cylinder, and also on the num- Due to the formation of the spiral passageways the liquid receives a spiral motion of a certain pitch, which helps the rotor to raise the liquid.

It can be easily seen that the casing and v cylinder in the casing, with the passageways formed therein, can be cast in a single piece if desired.

I-Iaving thus described my invention, what I claim as new and desire to secure by Letters Patent is:

.1. In a rotary pump, a casing; a cylinder 1in said casing havmg means on the lateral surface connecting it to the lateral surface of the casing and whereby spiral lateral passageways are formed, the adjacent passage-4 ways being open at opposite-ends, said cylinder having an inlet through one end and/.inlets in the lateral surface near the opposite end communicating with the spiral passageways which are open at the end opposite where the lateral inlets are provided, said cylinder having outlets in the lateral surface communicating with the other passageways; and a rotor in the cylinder having fanshaped blades and flanges having a central opening secured to the end of said blade, said flanges fitting snugly into said cylinder.

2. In a rotary pump, a casing having a 4cylinder therein spaced from the casing, and means dividing the space intermediate the two into spiral passageways open at one end, the adjacent passageways being open at 0pposite ends of said cylinder, the cylinder having an inlet communicating with the passageway open at one end and an outlet co1nmunicating with the passageway open at the other end; a rotor in said cylinder having a plurality of blades and llanged heads integral with the ends of the blades, said lange fitting snugly in the cylinder and having a central opening, the outlet of the cylinder being between said .flanges and the inlets of the same exterior of said flanges.

3. In a rotary pump, a casing; a director in saidcasing forming in combination with the casing a plurality of lateral spiral adjacentpassageways each having an opening, the adjacent passageways having the openings at opposite ends, said director having a cylinder therein having inlets communicating with the passageways open at one cud. and outlets communicating with the passage-Y ways open at the opposite end; a rotor in s'aid cylinder comprising fan-shaped blades,` end flanges having a central opening integral with the ends of the blade, said flanges fitting snugly into the cylinder with the outlet lying between the flanges, and the'inlet lying exterior of the same. 4. In a rotary pump, a casing; a director 1n said casing comprising a cylindical tubular portion, open at one end, having flanged ends and lateral spiral ribs connecting the llanges of the opposite ends, said flanges and ribs contacting with said casing and forming therewith spiral passageways each opening at one end, the adjacent passageways having the opening at opposite ends, said director having. an inlet in the open end of said cylindrical portion and lateral inlet openings near the opposite end of the same below the flange portions at the said end, thereby the said inlet openings communicate with the spiral passageways open at the opposite end, said director having lateral outlets intermediate the end inlets entering the passageway formed by said lateral ribs and the langes adjacent the end inlet of the4 director; and a rotor in said cylindricall portion of the director comprising fanshaped blades, and end flanges having a central opening, integral with the end of the blades, each of said blades having the edge parallel to the axis of the rotor, and with said llanges fitting snugly into the cylinder of the director with the said outlets lying between the Hanges and the inlets lying ex terior of the same.

5. In a rotary pump, a casing having a cylinder therein spaced from the casing and means dividing the spaces intermediate the two into spiral passageways open at one end, the adjacent passageways being open at opposite ends of said cylinder, the passageways open at the same end forming an inlet to said cylinder, the passagcways open at the other end of the cylinder forming the outlet from the same; and a rotor in said cylinder.

6. In a rotary pump, a casing having a cylinder therein. said cylinder having lateral spirally-directed inlets intermediate said casing and cylinder, and also lateral, spirallymomma jacent passageways having the opening at opposite ends of said member, said passageways forming inlets and outlets for said inner member; and a rotor in said inner member.

In testimony whereof I have signed my name to this specification in the presence of ltwo subscribing Witnesses.

BENJAMIN FRANKLIN CATHCART.

Witnesses GERTRUDE DREW, CATHRINE CATHCART. 

